Michael, the facts of audio technology, which would be confirmed in a properly controlled blind listening test, are that there's no audible difference in either the quality or quantity of power available from those three amplifiers.

All of us (6 of us) agreed that the Odessey sound best with great dynamic and much more refine sound and detail.

The anthem have a better detail than XPA3 but due to it lesser power, the dynamic of the sound somehow are a lot flatter than the other two. And thus not good for movies.

The XPA 3 have the same dynamic (with lots of headroom) as compared with the HT3, but the sound is more metalic and edgy and also lose out the detial to the Anthem and HT3.

And yes, we agreed that amp do sound differently and we need as much power as possible to get most out of the speakers.

We tested scene from Star Wars' "Pod Race" and many concert songs.

Now, please don't fight :p

Good stuff. For another get together, test out some different brands of AVR's with different speaker/room correction programs. Use them as pre-amps if possible with external amplification with the auto calibration and equalization engaged on the AVR. It would be interesting to see which one would come out on top in your test.

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I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

Considering the fact that all three of these amps have a different power output, until you somehow, can get them to output at "exactly" equal moderate volume for your source material and can instantaneously switch between them, any realistic comparison is going to be difficult. I dunno, but, it always comes back to the same old story in these comparisons that if one of them is even slightly louder than the other, to the human ear it is going to be perceived as sounding "better" or at minimum, "different". For that reason alone and considering that this is such mature technology, I, personally, have never bought the idea that there is a "real" audible difference between various brands.